The Anniversary Barometer houses a highly reliable and accurate double diaphragm German aneroid movement. Forged from solid brass that is hand-polished and flawlessly lacquered, the distinctive dial of this barometer is intricately etched to create a rich and subtle pattern. The opening in the center of the dial allows you to see the intricate inner workings. The Anniversary Barometer is an eye-catcher whether mounted on a wall, boat bulkhead or placed in the Anniversary Wood Base (107B). Each Anniversary Barometer is marked with a unique serial number and is backed by a lifetime warranty.